User guide

304 Brocade 6910 Ethernet Access Switch Configuration Guide
53-1002581-01
RSPAN Mirroring Commands
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RSPAN Mirroring Commands
Remote Switched Port Analyzer (RSPAN) allows you to mirror traffic from remote switches for
analysis on a local destination port.
Configuration Guidelines
Take the following steps to configure an RSPAN session:
1. Use the vlan rspan command to configure a VLAN to use for RSPAN. (Default VLAN 1 is
prohibited.)
2. Use the rspan source command to specify the interfaces and the traffic type (RX, TX or both) to
be monitored.
3. Use the rspan destination command to specify the destination port for the traffic mirrored by
an RSPAN session.
4. Use the rspan remote vlan command to specify the VLAN to be used for an RSPAN session, to
specify the switch’s role as a source, intermediate relay, or destination of the mirrored traffic,
and to configure the uplink ports designated to carry this traffic.
RSPAN Limitations
The following limitations apply to the use of RSPAN on this switch:
• RSPAN Ports – Only ports can be configured as an RSPAN source, destination, or uplink; static
and dynamic trunks are not allowed. A port can only be configured as one type of RSPAN
interface – source, destination, or uplink. Also, note that the source port and destination port
cannot be configured on the same switch.
Only 802.1Q trunk or hybrid (i.e., general use) ports can be configured as an RSPAN uplink or
destination port – access ports are not allowed (see switchport mode).
• Local/Remote Mirror – The destination of a local mirror session (created with the port monitor
command) cannot be used as the destination for RSPAN traffic.
Only one mirror session is allowed, including both local and remote mirroring. If local mirroring
is enabled, then no session can be configured for RSPAN.
• Spanning Tree – If the spanning tree is disabled, BPDUs will not be flooded onto the RSPAN
VLAN.
MAC address learning is not supported on RSPAN uplink ports when RSPAN is enabled on the
switch. Therefore, even if spanning tree is enabled after RSPAN has been configured, MAC
address learning will still not be re-started on the RSPAN uplink ports.
TABLE 72 RSPAN Commands
Command Function Mode
vlan rspan Creates a VLAN dedicated to carrying RSPAN traffic VC
rspan source Specifies the source port and traffic type to be mirrored GC
rspan destination Specifies the destination port to monitor the mirrored traffic GC
rspan remote vlan Specifies the RSPAN VLAN, switch role (source, intermediate or
destination), and the uplink ports
GC
no rspan session Deletes a configured RSPAN session GC
show rspan Displays the configuration settings for an RSPAN session PE